Method and device for positioning ends of pipe sections relative to one another

Abstract

The invention relates to a method for positioning an end (19) of a first pipe section (14) relative to an end (20) of a second pipe section (18), the method comprising: (a) prepositioning the end (19) of the first pipe section (14) near the end (20) of the second pipe section (18), defining a connection area (51) comprising the respective ends (19, 20) of the first and second pipe sections (14, 18); (b) performing a measuring process comprising a plurality of measuring steps, each measuring step comprising: (b1) moving a sensing device (86) to a location (89a, 89b, 89c) near the connection area (51); (b2) automatically measuring the location (89a, 89b, 89c) of the sensing device (86) relative to a reference location (87); (b3) automatically measuring point positions (98a, 98b, 98c, 98d) of points on the ends (19, 20) of the first and second pipe sections (14, 18) relative to the sensing device location (89a, 89b, 89c); (c) determining a target position of the end (19) of the first pipe section (14) relative to the end 20) of the second pipe section (18) on the basis of the measured point positions (98a, 98b, 98c, 98d); and (d) moving at least one of the first and second pipe sections (14, 18) in order to obtain the target position.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is the National Stage of International Application No. PCT / NL2005 / 000292, filed Apr. 20, 2005, the contents of which is incorporated by reference herein.FIELD OF THE INVENTION[0002]The present invention relates to a method and device for positioning an end of a first pipe section relative to an end of a second pipe section. Methods and device for positioning pipe sections relative to one another are known in the art. The present invention relates in particular to the positioning of a pipe section relative to a pipeline which is laid at sea.[0003]When a pipeline is constructed, pipe sections are positioned in and end-to-end relationship and connected to one another. When the pipeline is made of a metal, the pipe sections are generally welded to the pipeline.[0004]During the laying of a pipeline at sea, the pipeline is suspended by a free end thereof from a pipe-laying vessel. The pipeline extends from the pipe-laying vesse...

AI Technical Summary

Benefits of technology

[0018]It is another object of the present invention to provide a method and device for positioning an end of a first pipe section relative to an end of a second pipe section wherein a better positioning of the end of the first pipe section relative to the end of the second pipe section is obtained, resulting in a smoother transition of the wall of the resulting pipeline at the connection.

[0094]In an aspect of the invention, the target position determining means is coupled via coupling means to the output organ. This provides the advantage that the measured point positions can be automatically transmitted to the target position determining means.

Problems solved by technology

However, in pipe-laying operations at sea, time is expensive.

This is due to the high operational costs of the pipe-laying vessel, and also due to the substantial number of highly skilled persons required on board the pipe-laying vessel in order to perform pipe-laying operations.

Therefore, the present method has a disadvantage in that it is very expensive.

The present method has a further disadvantage in that it is difficult to determine a substantially complete view of the dimensional variations of the pipe section and the pipeline, which may result in a non-optimum connection between the pipeline and the pipe section.

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